Engine Error
P0457
Evaporative Emission System Leak Detected (Fuel Cap Loose/Off)
Severity
Low
Symptoms
Check engine light, 'Check Gas Cap' message on dash, fuel smell
Common Causes
- Loose gas cap
- Missing gas cap
- Damaged O-ring seal on the gas cap
- Damaged fuel filler neck
How to Fix
- 1 Tighten the gas cap until it clicks
- 2 Replace the gas cap with an OEM part
- 3 Clear the code and drive cycle
- 4 Inspect and replace fuel filler neck if rusted/damaged
Estimated Repair Cost
USD
$0
–
$300
Tighten cap: $0; New gas cap: $20 - $40; Filler neck: $150 - $300